You can't do that without the SE Toolbox. Just pick a contact with the Xperia Unlock Service
, there the guy has the box for it, he will do everything for you, you only have to send 24 USD via paypal, and he will unlock your device over the internet. And by the way you don't need to use testpoint.
PS. he will unlock the SIM lock of the device too
Device: Xperia X8 Black
Bootloader: Unlocked 11W48 (done with SETool2)
CPU clock: 600 MHz
Samsung 8GB Class6 ---> SanDisk Mobile Ultra 16GB UHS-I